The following questions are guidelines for your exposé. Feel free to use them in whatever order you like.

 What can you say about the current in resistances which are in series ?

 What law has been applied to show that.

 R1 = 1 kohms. Give the value of R2.

 What is a potentiometer ?

 What is the maximum voltage available on the potentiometer ?

 Give the value of the voltage when the cursor of the potentiometer is half way.

 Give an application of the potentiometer.